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  1. BOX in the making
  2. How about paralleling output tubes
  3. Are they basically Borbely hybrid circuitry?
  4. Service Life at Low Plate Current
  5. Sophia Electric SE Transformers for 813 "Super Schade"
  6. 10W suitcase amp
  7. PP OT made of 2 transformers
  8. If I change B+ do I have to change the circuit?
  9. PhonoDude
  10. Lafayette Phono/Reverb /Center channel amp
  11. Seller recommendation needed.
  12. Jeffrey's Super Circlotron (hybrid)
  13. Request for obscure heater specs
  14. Jolida JD1501RC Service Manual / Schematic
  15. 80W amp with a pair of EL34
  16. Epiphone Valve Junior to HiFi Conversion
  17. Serious Distortion on my DIY Toccata Phono Preamp
  18. Hickok 539b switch settings for 6SL7
  19. help me designing parallel SE guitar amp with 12at7 as power tube
  20. Voltage Change9115v/230v) of Audio Research amplifiers
  21. HF oscillation with no load, but only on one channel.
  22. Tube innards
  23. Peavey valveking 112 lead (distortion) channel doesn't work
  24. Looking for a tube amp
  25. What happens If I use too weak output transformer?
  26. Chinese amp: 2A3 6SN7 6SJ7 5Z5P push pull
  27. 6C33C based Version for Welter's Single Ended Amp (enhanced Forward Transconductance)
  28. Single Ended EL84 B+
  29. Looking for some PSU advice ...
  30. Electronic transformer filament supply
  31. Which Salas HV shunt regulator should I choose?
  32. Traced an old valve with no specs - thoughts please
  33. Resistor socket?
  34. Dynaco PAS 3X PSU mod
  35. Best sounding 500v. electrolytics
  36. CCS's for CCD line amp?
  37. tube life
  38. For tube amps w/ high output Z - Parallel R cross spkr?
  39. High and low impedance output preamps
  40. LTspice and simulating tube circuits?
  41. Cheap & Well Made Chinese SE EL34 Amp
  42. Heathkit transformer replacement...
  43. Integrated amp will not turn on
  44. EL34, Claus Byrith amplifier, mains noise problem
  45. Need a proposal for a stereo amp
  46. 12AT7 Headphone amp
  47. 6l6/12ax7 schematics please
  48. Hybrid bridge with jfet OS
  49. Please allow me to introduce myselft
  50. Chassis Source
  51. Is my 6L6 amp damaged from EL34's
  52. VISHAY VTA 55 Bulk Metal Foil Resistors?
  53. High-Voltage Power for 6 stage pedal
  54. 10 megaohms??
  55. E180F V EF184
  56. help on gain calculation with transformer for SE tube
  57. Working with constant current charts
  58. Hum and noise in small amp
  59. My project (6c33SET)
  60. EZ260A Grommes 260A Project
  61. 18A5 sound fine in triode mode ?
  62. 6GF5 sound fine in triode mode ?
  63. Muddy 6V6 Power Amp?
  64. GM 70 Schematic needed!
  65. tube simulatie models.
  66. building vacuum tubes... some questons
  67. Hot Rodded Dynaco ST-35 - Dynakit Parts Kit
  68. Fixed bias on small signal pentode
  69. Buffer preamplifier
  70. 7027a testing
  71. decade bank values for a plate current tester
  72. anyone know the dimensions of a dynakit st-70 pcb?
  73. Help on designing full DHT SET power amplifier
  74. dc coupled volume pot value
  75. 20W OTL with 6N5P, Opinions...
  76. Finding parts
  77. Tube's JLH hybrid solution
  78. Curtis Mathes Console / TV receiver
  79. Marantz 8b feedback circuit
  80. Noisy volume pot with some tubes but not others
  81. Found an Eico HF-86 for sale, is it worth it?
  82. Paco T-60 Tube Tester
  83. Aikido all in one heater issue
  84. Need a little help with Chinese tube Preamp
  85. Choke Loaded Const. Current Draw Amp
  86. 6550 SINGLE-ENDED AMPLIFIER
  87. Balancing pp driver stage
  88. P-P 6C33
  89. Need help with Cornet 2
  90. Sweet folly: a tube SMPS
  91. More articles for the Wireless World Archive
  92. Recommendations for a valve amp kit
  93. 2 watt amplifier
  94. 1AX7
  95. 2 x 6as7 -> u=?
  96. Help with transformer
  97. Building a mu-follower stage
  98. ecl11 - ecl86 replacement
  99. Please comment on this grounding scheme.
  100. A tube-preamp with DSP-DAC-Touchscreen-and Music Streaming...
  101. Microphone modification help
  102. Microphone modification help
  103. First time hearing an SET
  104. Rattle can a power transformer
  105. Need better RIAA circuit for my phono amp.
  106. Input volume pot wiring
  107. Constant current heating undervoltage
  108. Some tube info that I hope is helpful
  109. Toroidal output transormers
  110. cathode bypass on opt secondary
  111. Push Pull Powersupply Test Question?
  112. Recommandation please..
  113. My new humble thread
  114. KT88 single stage pp - cascode diff amp
  115. foot switch safety question
  116. Which KT88 Brand to Buy?Sso many to choose
  117. 12ax7 perfect bias point
  118. preamplifier/driver for 807
  119. Help with Quad II hum
  120. 18K audio note output transformer
  121. Small tube amp conversion help 6x4, 6AU6, 6AQ5
  122. Hybrid never see
  123. "Next to Last" PAS Project
  124. Power supply overload
  125. Home build 6L6 pp amp buzzing noise
  126. 807 monoblocks with big PSU
  127. SET amps and crossovers.....?
  128. Sockets for 6P41S
  129. 6dj8 phono amp
  130. Jolida Score!!!!
  131. voltage boost
  132. Swinging choke value in PSUD
  133. Hum Nirvana
  134. Plates glowing on my Fender Concert after blowing fuse
  135. This weekend's reading
  136. 6550-6550A-6550B-6550C - What are exactly Differences ??
  137. Interstage Transformer Questions
  138. Vacuum State FVP5A voltages
  139. can you help me out? Sencore TC114 tube tester
  140. Steve Bench's tube crossover - Help needed.
  141. transformer design equations
  142. Retrofit idea, need advice, 6L6SE guitar amp
  143. some misc schematics, manley, rotel
  144. What happened to my tube??
  145. Tube Preamp Question
  146. Schematic for Pilot SP215
  147. Screen current through cathode resistors
  148. Gyrator design
  149. Any tips for routing heaters on a PCB
  150. 6EZ5 as drop in replacement for 6V6 tube?
  151. RIAA Preamp and equalization 12AX7
  152. Correct hum mods?
  153. Push-Pull from Stereo SE amp
  154. how to select transformers.
  155. Ultrapath or parallel feed apps. for 7591 amps?
  156. PP-UL amp with KT88
  157. Reuse these sockets and tube choice question
  158. Need help understanding this circuit
  159. Need a little help with a power supply I designed.
  160. Which tube Rectifier is good enough for 5902 tube amp ?
  161. Schematic for Masco ME-8?
  162. Transformer Rattle & Hum issue - Dynakit ST-70
  163. pio coupling caps - damaged/used?
  164. 6EZ8 (and other triple triodes) help please!
  165. Akron, Ohio
  166. 6N6P Heater and earth wiring advice
  167. united transformer corporation
  168. Capacitive v. Inductive inter-stage coupling
  169. unused secondaries on SE opt?
  170. Marco Rodint coil building info needed
  171. Scott 222B Hum
  172. how to make audio output transformer
  173. 5842 Anyone?
  174. 813 SE build
  175. Aikido LV improved psu
  176. My first HiFi project
  177. B&O 608 tube amplifier
  178. Just designed a 300b amplifier....
  179. Anyone used C3g to drive GM70?
  180. Capacitors found, have you used these?
  181. I need your help!!!!!
  182. 12au7 600 ohm output
  183. new C3g/211PSE comments pls
  184. anyone know of a source for 12 pin+ connectors?
  185. Dynaco Mark IV Power Resistor
  186. Moondog with ac on gain & driver tubes?
  187. need help again on DIY Toccata MC Phono preamp
  188. Looking for analog Tube schematic for "analogmetric 1541a" DAC
  189. newbie needs help with tube inheritance
  190. 2A3 SETs with Edcor Iron
  191. What to do with this iron (originally from PP 7355)
  192. Just for everyone's amusement....
  193. beam tetrode calculations
  194. What are the differences between LC and CLC chokes
  195. gain and mid circuits
  196. Kay 503 Schematics?
  197. Transformer Data
  198. tube B 406 triode dick's cleo 4
  199. GE Snubber, High Current DC, and Switching Capacitors
  200. Russian EL84 - Many varieties
  201. Back From the Dead- A NOS Tube Story
  202. application for ccs/gyrator board from the groupbuy
  203. Building a tube radio
  204. Three more articles for the WW Archive
  205. Amplifier antics
  206. what about a tube makes it UL recommended
  207. 6as7 p-p with transformer phase-splitter
  208. Large power push pull output transformers, say 150W
  209. I need a schematic for a amp project
  210. Preamp resistors calculation for http://www.shine7.com
  211. Best replacement solid state rectifiers for a 400V 125 mA supply in a tube amp
  212. Dynakit PAS-2 Filament Voltage Question - replaced Selenium rectifier
  213. Vintage tubes
  214. Amp PSU standby and PA switching
  215. 245 tubes
  216. Vacuum tube clock radio
  217. First Project, need some help
  218. Graetz Scerzo Schematic
  219. simple se 2a3 amp help!!!!!
  220. 5bc3 rectifier
  221. Help me improve this PSU. (6c33 set, voltage doubler)
  222. Choke Loaded Driver Load Lines Question
  223. CCS and tube aging
  224. Tetra lives!!!!!
  225. Tube shops/supplies in Brisbane/Gold Coast
  226. AC VT25 filament?
  227. Let's show go on: Building Monster SE!
  228. Mystery 6AQ5A powered chassis?
  229. 6Y6G tube for low-voltage SE amplifier?
  230. Jolida gain and negative feedback?
  231. 1/2 of the tube for each channel?
  232. Problem with Legacy pentode driver stage
  233. 845 Operating Point
  234. Tube rectifiers
  235. D76 Inrush current limiter thermistor?
  236. New to Tubes? How to get the basics, read on..
  237. interstage tansformer impedence
  238. 2 PSU sharing the same Power transformer?
  239. Biasing amp
  240. CCS placement
  241. clueless on console
  242. 5E3 Build Problems Cont'd
  243. Popping in stepped volume control
  244. 6by5 CRC Values
  245. Is this do-able?
  246. PCB for Gary Pimm's CCS & SS Pentode
  247. EL86 Single Ended PP Power Amplifier
  248. Diyhifisupply Billies - dead OPTs?
  249. 6H30P-DR
  250. Tube AMP and stax headphones....

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